Rubber boot or shoe.



r A. D. WARNER. RUBBER BOOT 0R SHOE.

APPLICATION FILED KAY 3, 1010.

989,089. Patented Apr. 11, 1911.

WITNESSES: INVENTOR ATTORNEY 1n: Mann: PETER! cm. w'asnmarau, n. c.

ADNA D. WARNER, OF MISHAWAKA, INDIANJ'Lv RUBBER BOOT OR SHOE.

Specification of Letters Patent.

Patented Apr. 11, 1911.

Application filed May 3, 1910. Serial No. 559,067.

To all whom it may concern:

Be it known that I, ADNA D. VVAnNnR, a citizen of the United States,residing in Mishawaka, county of St. Joseph, and State of Indiana, haveinvented a certain new and useful Improvement in Boots and Shoes, ofwhich the following is a specification.

This invention relates to an improved rubber boot or shoe wherein apeculiar form of combined insole and filling sole is employed, with theresult of increasing the life of the boot or shoe and of decreasing thelabor incident to its manufacture.

The improved combined insole and filling sole is made by an improvedmethod in one solid integral piece without cement or hand rolling ashereinafter described, and as particularly claimed in my copendingapplications, which are divisions of this application.

The combined insole and filling sole in question lends itself to easyand rapid manufacture and to simple and ready adjustment in properrelation to the other portions of a boot or shoe, and it possessesfurthermore a high degree of strength and durability, whereby the lifeof the boot or shoe of which it forms a part is increased.

In the accompanying drawings, Figure 1 is a vertical section through thelower part of a rubber boot, showing the relation of the improved formof combined insole and filling sole to the other parts of the boot, Fig.

2 is a plan view of the combined insole and filling sole, lookingdownward, and Fig. 3 is a section on the plane 33 of Fig. 2.

The combined insole and filling sole is manufactured as follows:Calendered sheets of the rubber compound, or equivalent material, areprepared; the sheets intended for making the wider portion 10 of thecombined insole and filling sole being faced with fabric 12 in any wellknown manner. These faced sheets arethen cut or stamped to the propershapes and sizes to make the portion 10. The narrower portions 11 arecut or stamped out of similar calendered sheets, which, however, are notfaced. The shaped pieces 10 and 11 having been cut as described, theunfaced piece 11 is placed upon the unfaced side of the piece 10 in theposition shown in dotted lines in Fig. 2. A piece of fabric 13 of propershape and size to entirely cover the combined insole and filling sole isthen laid over the two sheets of uncured rubber compound, and the wholemass is subjected to pressure, preferably in a hydraulic press. Inmaking the boot or shoe the combined insole and filling sole thusproduced is assembled with the material for the uppers, 14, upon a treeor last, and the outer sole 15 is applied as shown in the drawings; theinturned edges of the uppers folding under the wide layer 10 andabutting against the part 11. The insole and filling sole combined maybe vulcanized separately from the remainder of the boot (either whenfirst compressed or later) and may be cemented to the other portionsbefore final vulcanization, or the bottom portions of the boot,including the comblned insole and filling sole and the outer sole mayall be vulcanized together under pressure.

By the use of the above process, I avoid all cementing between thelayers of the ins sole and filling sole, and secure a homogeneous andintegral mass faced on both sides with fabric incorporated by pressurewith the rubber or equivalent compound.

In my preferred modificatlon of this invention the two portions 10 and11 of the combined insole and filling sole differ further in therelation of their lon itudinal di mension to the direction of ro ling ofthe respective sheets. In the wider sheet 10 the longitudinal dimensionis the direction of rolling, while the narrower sheet 11 is cut with itslongest dimension at right angles to the direction of rolling. I findthat this arrangement of the calendered material adds greatly to thecombined flexibility and strength of the inner parts of the bottom ofthe shoe or boot, because the calendered material is more flexibleacross its direction of rolling, while the use of the up or layer cutlongitudinally of the sheet, fir y united to the transversely cut layer,prevents all tendency to split due to the natural bending of thecombined insole and filling sole during use.

What I claim is- 1. The process of manufacturing rubber boots and shoeswhich consists in forming of reen compound and assembling separate yfrom the remainder of the boot or shoe an insole and a narrower fillingsole, uniting the two b extremely high pressure so as to form anlntegral mass shaped with a recess all around and under it, applying theintegral mass so formed as a unitary article to a last, applying thegreen upper to said last, applying a green outer sole to the remainderof the boot or shoe, subjecting said pieces to extremely high pressurewhere by an integral unitary article isformed, assembling this articleWith the remainder of the boot or shoe, and vulcanizing the same inplace substantially as described.

ADNA D. WARNER.

parts so built up, and vulcanizing the Whole, substantially asdescribed.

2. The process of manufacturing rubber boots and shoes which consists informing of green compound from calendered sheets a relatively Wideinsole and a relatively narrow filling sole so cut that the line ofrolling is longitudinal in the insole and transverse With respect to thefilling sole, assembling 10 the two shaped pieces separately from the-Witnesses F. G. GBIMEs, F. E. MATHIAS.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

